Our FTC team is looking for two 6" wheels that where used during the 2009 Lunacy game. They are the special wheels that had a hard plastic tread instead of the soft rubber tread of the AM-0144 wheels. We need these asap as we just qualified for state in two weeks and need to improve our robot drive train.
Have you tried Fruitport or NC Gears direct? They are the only local teams that were around back then. Otherwise you might have luck with the group of teams from the Holland/Zeeland area.
We are currently using four rubber treaded 6" wheels. During autonomous turns we noticed that our robot behaves differently on various fields based on the amount of friction of the rubber tiled flooring. We are hoping that by changing the front wheels to less grippier ones we can get more consistent turns. we DO NOT want to go to omni wheels in front. I hope that clarifies our intent.